Albert Barnes Commentary Leviticus 2:14

"And if thou offer a meal-offering of first-fruits unto Jehovah, thou shalt offer for the meal-offering of thy first-fruits grain in the ear parched with fire, bruised grain of the fresh ear." — Leviticus 2:14 (ASV)

Green ears of corn - Rather, “fresh ears of corn;” that is, just-ripe grain, freshly gathered. Parched grain, such as is here spoken of, is a common article of food in Syria and Egypt, and was very generally eaten in ancient times.

Beaten out - Not rubbed out by the hands, as described in (Luke 6:1), but bruised or crushed so as to form groats.